The exterior facade is a combination of concrete walls and precast panels made of Ultra-High-Performance Fiber Reinforced Concrete (UHPRFC). The entire building envelope is adorned with a mineral pattern inspired by Sumerian writing that filter the light like the foliage of a tree canopy. The concrete walls are colored "Bourgogne stone" and incorporate a matrix, while the precast panels are hung and do not have visible joints, resulting in a mineral density. The precast panels of "dark tobacco" color serve as cladding, sunshades, and anti-vandal reinforcements. The "Terre de Sienne" colored concrete flooring continues on the interior walls of the ground floor, creating a tactile perception and a warm, sensual atmosphere for visitors. A horizontal line created by sandblasting reinforces the project's horizontality. The mineral density, natural and massive appearance and the large textured concrete walls provide a soft and velvety feel to the circulation areas and the media library's large reading room.